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(No Medal.)

W. H. WILSON. INGRUSTATION PREVB NTER.

v No. 484,837. Patented 001;. 25, 1892.

UNITED STATES PATENT OFFICE.

WILLIAM H. WILSON, OF INDIANAPOLIS, INDIANA, ASSIGNOR OF TWO-THIRDS TOALEXANDER P. SPRUANOE & CHARLES H. MCCORMICK, OF SAME PLACE.

INCRUSTATION-PREVENTER.

SPECIFICATION forming part of Letters Patent No. 484,837, datedOctober-25, 1892.

Application filed November 9, 1891- Serial No. 411,41'7- (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM H. WILSON, a citizen of the United States,residing at Indianapolis,in the countyof Marion and State of Indiana,have invented a new and useful Improvement in Incrustation-Preventers,of which the following is a specification.

My invention relates to an improved method and apparatus for feedingpetroleum and other liquid scale preventives to steam-boilers.

The object of my improvement is to furnish to the boiler a continuousregulated supply of petroleum or other like scale preventive.

The accompanying drawings illustrate my invention.

Figure 1 represents an elevation showing the apparatus connected to theboiler. Fig. 2 represents a vertical section of the oil-reservoir on alarger scale.

In the drawings, A represents a closed reservoir, which is connectedwith the steamspace of the boiler 13 by means of the pipe 0, which isprovided with a stop-valve D. Pipe 0 enters the top of reservoir A andextends to within a few inches of its bottom. Reservoir A is alsoprovided with an inletpipe E for the purpose of filling it with oil, andwith a drainrpipe F, both of said pipes being provided with suitablestop valves. The upper part of reservoir A is connected with thewater-space of the boiler by means of a pipe G, in which is arranged asightfeed apparatus H, of the usual well-known construction, and astop-valve J. Pipe G is preferably connected with the water-space of theboiler through the feed-water pipe I, or it may be connected therewithby any suit able means, by which pipe G discharges into the water whichis fed to the'boiler.

In operation a quantity of cold water is first poured into the reservoirA, through pipe E, in a sufficient quantity to fill the reservoir to apoint above the lower end of pipe 0, as at 0, Fig. 2. The remainder ofthe space in the reservoir is then filled .with petroleum or other likescale-preventing material. The valve in pipe E is nowclosed and thevalve J in pipe G is opened. Steam having been raised in the boiler,valve D in pipe 0 is opened, thus subjecting the water and oil in thereservoir A to the same pressure to that carried in the boiler. Thesteam condensing in pipe 0 forms a column of water higher than thesurface of the oil in the reservoir, and needle-valve L being open theoil escapes from the reservoir through pipe G and valve L into thesight-feed glass and, being of less specific gravity than the water withwhich said glass and the pipe leading therefrom is filled, the oil risesdrop by drop through said glassand pipe intothe feed-waterpipe I, Where,mingling with the feed-water, it passes therewith into the boiler. Asthe oil passes out of the reservoir A, its place is taken by the Waterformed from the condensed steam in pipes O, the relative amounts ofWater and oil being readily observed in a gage-glass N,

connected to the reservoir. By this means the scale preventive issupplied to the boiler in the most economical and efiective manner. Thereservoir A is preferably placed below the level of the boiler, so thatthe oil is floated up into the sight-feed apparatus by thecondense-water in the bottom of the reservoir. The rush of thefeed-water through the pipe I into the boiler relieves the pressure inthe pipe 9 and permits the. steam to force the oil upward through thesight-feed apparatus as long as the feed pump or ejectoris at work. Atother times the feed of oil is reduced automatically to a very smallamount, which is fed forward by the weight of the water of condensationwhich accumulates in the pipe 0.

What I claim is The combination, with a boiler and a feedwater pipeconnected thereto, of a reservoir for oil, a steam-pipe connecting theupper part of the boiler with the lower part of the reservoir, oil-pipesconnecting the upper part 0 of the reservoir with the said feed-waterpipe, and a sight-feed device arranged in the said oil-pipes,substantially as and for the purpose set forth.

WILLIAM H. WILSON. Witnesses:

H. P. HOOD, V. M. H001).

